Hydraulic pump



w. F. G'HANT.

. HYDRAULIC APPLICATION FILED 1 4, 1919. 1 ,402,761 Patented Jan. 10, 1922,

rns" WILLIAM: F; GRANT, OF CLEVELAIFTD HEIGHTS, OHIO, ASSIGNOR TO THE WILL'MAN- SEAVER-MORGAN COMPANY, 01* CLEVELAND, OHIO, A COB-EQBA TION OF OHIO.

HYDRAULIC PUMP.

, To all whomz't may Camera:

' Be it known that 1, WILLIAM F. GRANT, a

citizen of the United States, residing at Cleveland Heights, in the county of Guyahoga and State of Ohio, have invented a certain new and useful Improvement in Hya draulic Pumps, of which the following is a full, clear, and exact description.

This invention relates to a hydraulic pump.

The principal object is to provide a pump which iselficient and durable, which can be produced at relatively low cost,. which is so designed as to the location of the pump and valves and number and arrangement of water passageways that in operation there is aminimum loss of pressure due to resistance and'eddying, and so the pump block is silent in action, there being a total absence of noise due to the circulation of water, as

exists when the latter is required to pass through tortuous passageways.

The invention may be briefly summarized as consistlng in certain novel details of construction, and combinations and arrangements of parts which will 7 be described in" the specification and set forth in the appended claims.

' In the accompanying sheet of drawings wherein I have shown a pump block composed of three pumpswith three ports or valves" associated therewith, Fig. 1 is a transverse sectional view of the ump block;

i of metal which is preferably rectangular in Fig. .Z'is a top. plan view; an Fig. 3'is a;

vertical sectional view taken substantially along the line 33 01" Fig. 2,

. The hydraulic pump comprises a block 10 cont0ur,.and may be of steel, or steel forging. The length of this block will depend upon. the number of pumps and associated valves with which the unit is to be provided, the construction being such that there maybe as many pumps and valves associatspeci fication of Letters Patent. ?ai; n$ed Jan 10, 1922.

Application filed July 24, 1919. Serial No. 312,962. V I

ed therewith as is desired from one to a indefinite number, three being shown in this instance.

The pumps comprise plungers 11, which Lean be operated in any suitable manner, as by rods power. operated in any'suitable fashion, these plungers extending down through combined guides and packing glands 12 into pump cylinders 13 which are drilled into the block 10, in this instance, .verticallyirom the top side and near the rear face. The upper part of each pump cylinder 13 ismade somewhat larger than the lower part to accommodate the packing and lower end of the packing gland and guide member 12. 1

' Each pump has associated with'it, two valves, which in accordance with the present invention are arranged in line with each other, and in this instance, one above the other, in the same valve chamber 14, formed i by drilling into the block from the top and forwardly of the pump. in this valve cham ber 14 is an exhaust valve 15, and below the latter an inlet valve 16, each valve consistmg of a circular head which engages a ta pered seat of the chamber, a guide extension which extends down from the seat, and an upper extension which extends up from the;

seat to limit Ithe'upward movement of the valve when it is unseated. The upper valve which is the exhaust valve, as before stated,

is somewhat larger than the inlet valve, this construction being provided to enable the assembling and seating of both valves from the top of thevalve chamber, which after the va ves are in place, is closed by a plug 17. The valve chamber 14 is drilled entirely through the block," and the lower portion just beneath the inlet valve 16 isthreaded stroke. This passageway 19 is formed by sageways 19 being closed by a threaded plug'.20. It might be mentioned at this point that these plugs 20 are the only ones required to plug the ends of any of the water passageways so that in a pump block having one pump, there is required only one passageway closing plug, aside, of course, from the plug which closes the top of the valve chamber. a

V Extending horizontally through the block,

and intersecting all the valve chambers 14:,

is a delivery passageway 21 which intersects the valvechambers above the outlet valves 15. Screwed into both outer ends of this one purpose for whichthe pump block is very well adapted and used by me, i. e. to pump water from a tank to the hydraulic cylinder of a press, are provided respectively witha control valve and pressure relief valve. Additionally a delivery passageway 2a may be provided from the front of the block to one 01 the valve chambers,in this instance, to the middle valve chamber I 14. Into the outer end of this passageway may be screwed an auxiliary delivery pipe- 25.' The provision of this passageway 24 and delivery pipe 25 is not necessary, however, as the water may be delivered to the cylinder or other receiving element bysuitable attachment to the delivery pipe 22 containing the control valve.

In operation, on the upstroke or". the piston or plunger 11, or of the several plun gers 11, the inlet valve 16 is elevated and water flowsirom the supply pipe 18 (or pipes 18, as the case may be) into the passageway l9 and to the pump cylinder. On the down stroke of the piston or plunger "the inlet valve is seated and the outlet valve is unseated, water being forcedby way of the passageway 19 and valve chamber up past the outlet valve 15- into the delivery passageway, and by way of the pipe 22 or pipe 25 to the cylinder or chamber'to which water is, being pumped. hen the inlet valve is unseated on the suction stroke, the extension on the upper part of the inlet valve engages the extension on the lower face of the exhaust valve to limit its movement. VVhen the exhaust valve is unseated on thepower stroke of the pump pistonor plunger, the extension at the top of the exhaust valve engages an extension on the bottom of the closure plugl! which closesthe top of the valve chamber so as to limit the upward movement vof the exhaust valve.

In using this pump block for supplying water under suitable pressure to the cylinder of a hydraulic press, when the control valve is in one position and the pumps are the pipe 25 is not utilized, byway of the pipe 22 and branch pipe leading therefrom which will be connected to the cylinder.

i will be seen, therefore, from the above description considered. in connection with the drawings, that this pump has the desirable teaturesinentioned at the beginning of the specification, the featu-reso't simplicity, ease of construction, durability and effi- I I ciency heing particularly apparent. delivery passageway 21 are delivery p1pes 22 and 23, which pipes when employed for Having described my nvention, Iclaim: 'i. A hydraulic pump comprising a onepiece'block of substantially rectangular formation having 7 pump cylinders I formed thereln, and valve. chambers formed 1n the same, one for each pump cylinder, andarranged ad acent and' substantially, parallel thereto, each valve chamber containing an inlet valve and an exhaust valve 1n lme with each other, and saidblock having a passageway extending from'each pump cylinder to the associated valve chamber, and having supply and exhaust passageways communicating with the different valve chambers j the exhaust passageway. extendlng from one end on". the block through toward the opposite end. thereof and intersecting the diflerent valve chambers. I I I 2. A one-piece block for ahydraulic pump of substantially rectangular contour having a plurality of pumpcylinders formed in the same and extending from the top face downward, a plurality of valve chambers extendingfrom the top face to the bottom face, passageways extending fromone side of the block and connecting each pump cylinder to one of the valve'chambers, and a passageway extending endw1se through the blockand intersecting the valve-chain hers, said passageway having an outlet leading from at least one end of the block, and an outl t leading from the front face of the block.

8 A hydraulic pump comprising a one-.

piece block having pump cylinders formed haust passageways communicating with the different valve chambers, there being an exhaust passageway extending from one end of the block to the other andhaving a delivery pipe connected to each end thereof 1,402,761 I y g 8 e. A one-piece block for ahydraulic pump pump cylinder to one of the valve chamhaving a plurality" of pump cylinders bers, and a passageway extendin from one I formed into the same and extending from end of the block to the other an intersect- 10 the top face downward, a plurality of valve ing the .valve chambers. I

5 chambers extending from the top face to In testimony whereof, I hereunto aflix the bottom face, passageways extending from my signature. one side of the block and connecting each WILLIAM EGRANT.

Certificate of Correction.

It is hereby certified that the assignee in Letters Patent No. 1,402,761, granted January 10, 1922, upon the application of William F. Grant, of Cleveland Heights, Ohio, for an improvement in Hydraulic Pumps, was erroneously described and specified as The Willman-SeeVer-lViOrgan Company, Whereas said assignee should have been described and specified as The Weltmcmflatter-Morgan Company, as shown by the records of assignments in this ofli'ce; and that the said Let-- ters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 20th day of June, A. 1)., 1922.

KARL FENNING,

Acting Commissioner of Patents.

[SEAL] 

